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Special indicators

HUVUDVARN.: Main caution light. Indicates important system warnings. See below.

HÖJDV: Flashes when autopilot HÖJD (altitude hold) is set and aircraft not at target altitude or vertical speed above 200 m/min. Lit when stable at target altitude. It is recommended to be at target altitude before setting autopilot to HÖJD.

Gauges and instruments

Fuel gauge

Shows percent of drop-tanks left until they are empty if attached. Otherwise percent of internal fuel remaining. The two needles shows left/front and right/rear tank level. The engine is supplied by the two tanks alternating if not on afterburner, therefore the needles will chase each other down the scale.

G-gauge

Max G-force is displayed by a striped needle. Reset by clicking the small reset pin on the right side of the instrument.

Altitude gauge

Pressure setting is done by clicking left or right side of the setting knob (lower left of he instrument).

The real AHK (swe.Avstånd Höjd Kommando, eng. distance altitude command), on the right side of the radar, was an instrument connected to the Swedish air combat control centres (The system is part of "STRIL60"). It gave tactical information to the pilot by 20 different commands, displayed as words at the top of the instrument, and also by the distance scale and the arrow needle on the height scale. Some of the commands are reused as instrument modes.(6)

In all modes the "HÖJD" (altitude) scale shows pressure-altitude. Dot-needle from 0-2000 m and tape-needle from 0-20000 m.

TANK LUFT, OLJE TRYCK, EL FEL, HYDR I and HYDR II will be lit when generator off. But should go off during engine start up.

Radar

Showing a sweep and antenna azimuth as well as navigation indicators.
In multiplayer the radar shows aircraft in radar range: dist. < 40 km, +-60 deg in yaw, +-30 deg in pitch and > 100 m above ground.
Yellow lines are navigation indicators used by the navigation system. See below.
Radar modes are set on the navigation radio.

Radio

The radio equipment consists of two transceiver and one control unit of model Fr-21. They are on the left horizontal panel (14). In the simulation both transceivers are used for communication. In the real aircraft one was the receiver for combat control data feeding the AHK and other avionics. The letters A-K stores pre set frequencies for transceiver A (closest to the control unit) and the numbers 1-5 stores pre set frequencies fro transceiver B. A stores the COM1 frequency at FG start up, B stores COM1 standby frequency. Number 1 stores the COM2 frequency at FG start up, 2 stores COM2 standby frequency. The frequency for the other letters and numbers are in the text file Avionics/Fr21.txt and can be changed by the user.
Pressing the buttons marked with dash (-) makes it possible to manually set the transceiver’s frequency using the knobs on the unit.
The radio is off at simulation start. Transceiver B uses battery power and transceiver A uses main AC.

Autopilot

The autopilot is on the right side of the seat (11) and has the following functions and controls:

HÖJD: Altitude hold

ATTITYD: Attitude hold- pitch and roll

DÄMPN: Pitch and yaw-damper on. This is on in all normal flight conditions

IMPORTANT: The autopilot has an automatic switch to only damping if airspeed is Mach 0.95-1.05 or G-force is above 4 G or below -0.5 G. No warning is given.

At present the autopilot is not as stable as it should be, especially altitude hold.

Navigation radio and mode selector

3D model right side panel below cautions.(10) Main mode selector for navigation, AHK and radar.

Draken does not have ordinary navigation instruments. It has a special system that was integrated in the combat command and navigation system of the Swedish airforce. A letter code was used to select navigation beacons and airbase landing system. There was two parts of the system: Anita - general navigation and Barbro - landing guidance.

To simulate this and still be compatible with FG there is a file beacons.txt in the aircraft's directory. In that file you write a line for each beacon you want to use. The format is a comma separated list: letter code,type,frequenzy,note

letter code: Three letters A-P that identifies the beacon. Anita (VOR, NDB) does only use the first two (you can set the last to any character you want). Barbro (ILS) uses all three.

Droptank fuel valve: Right front canopy rim.(8) Set to on (forward) when using drop tanks.

Parking brake: Center console below instrument panel to the right.(5)

Jettison droptanks: Left side with red protection ring.(4)

Canopy handle: Left side(3)

Start panel: Lower left instrument panel.(2) Se below.

Instrument and panel lighting: Left side knob above throttle.(1) Click to change intensity.

Landing/taxi light switches: Left front canopy rim (12). Left and right landing light. If switches are in on position the lights will be automatically turned on/off as landing gear are lowered/rised.
Navigation lights (sv. "Lanternor"): Right aft panel (13). Three settings are implemented; off, dim and bright.

Flying

Start panel

Starting the aircraft

Either press Shift-S and let the automatic start make the work or follow the check list below.

Battery switch on. The smaller covered switch on the start panel.(no. 1) Click cover to open and then switch.

Lock canopy. Click handle. The HUV LÅS caution should now go out.

Turn on main fuel pump. Under the large cover on he start panel.(no. 2)

Turn on afterburner fuel pump. Leftmost switch on the start panel.(no. 3) The red light on the start panel is now off.

Turn on drop tanks fuel valve. The yellow light on the start panel is now unlit.

Press START button on the start panel and wait until the engine is ignited.(no. 4)

Switch on the generator when engine at 30%. The switch next to the start button.(no. 5)

All caution lights should now be unlit in a few seconds.

Normal operations

Draken has elevons, combined ailerons and elevators. Large elevon deflections decreases the available aileron difference.

The aircraft has non-linear control response in elevation to lessen effect of small stick movements.

It is neutral in roll at low alpha. Keep an eye on the horizon.

To avoid accidents on landing is it not possible to retract landing gears if throttle < 90 %